US3448511A - Arrangement and method for constructing multispan bridges or the like - Google Patents

Arrangement and method for constructing multispan bridges or the like Download PDF

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Publication number
US3448511A
US3448511A US627071A US3448511DA US3448511A US 3448511 A US3448511 A US 3448511A US 627071 A US627071 A US 627071A US 3448511D A US3448511D A US 3448511DA US 3448511 A US3448511 A US 3448511A
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United States
Prior art keywords
bridge
island
girders
auxiliary girders
auxiliary
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Expired - Lifetime
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US627071A
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English (en)
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Bruno Suter
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Strabag Bau AG
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Strabag Bau AG
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/28—Concrete reinforced prestressed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49828—Progressively advancing of work assembly station or assembled portion of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53539—Means to assemble or disassemble including work conveyor
    • Y10T29/53543—Means to assemble or disassemble including work conveyor including transporting track

Definitions

  • the present invention relates to an arrangement and method for constructing multispan bridges or the like across water, whose superstructures are successively constructed with the aid of auxiliary girders which are supported on already constructed bridge piers and which are movable in the longitudinal direction of the bridge, the fore-ends of the auxiliary girders forming cantilevers which are held by an auxiliary support.
  • a travelling girder which serves to advance structure girders which carry the formwork and the weight of the superstructure during concreting, is simultaneously used in order to construct, while working from it, the bridge piers together with their foundations.
  • the equipment necessary for this is mounted on the cantilever arm of the travelling girder which may also be supported by an auxiliary support.
  • FIG. 1 shows a schematic longitudinal view of a landing bridge, constructed according to one embodiment of the present invention, in the course of construction;
  • FIG. 2 shows a schematic cross-sectional view through the bridge taken along the line II-II of FIG. l;
  • FIG. 3 shows a schematic cross-sectional view through the bridge taken along the line III-III of FIG. l;
  • FIG. 4 shows a schematic View corresponding to FIG. 3, at a different stage of construction
  • FIG. 5 shows a schematic View similar to that of FIG. 2 which illustrates the construction of a superstructure for the bridge.
  • auxiliary girders which serve both to construct the superstructures and also as a track way for transportation means for the constructional material to be used for the superstructures and understructures, with such auxiliary girders resting, at their ends which face away from the constructional work, on the platform of a lifting island from which the understructures can be constructed.
  • an arrangement for constructing multispan bridges across water in successive spans mainly from heavy prefabricated elements which comprises at least two longitudinally spaced apart transverse crossbeams supported at the height at which the bridge is to be built, a pair of transversely spaced apart longitudinal auxiliary girders laterally outwardly resting on said crossbeams and spanning the longitudinal distance therebetween, said auxiliary girders being longitudinally displaceable with respect to said crossbeams and having a length greater than the longitudinal distance between said crossbeams to provide corresponding cantilever free ends of said auxiliary girders longitudinally extending substantially beyond said crossbeams, an island platform independently removably positioned in the water ahead of the corresponding free ends of said auxiliary girders at a distance corresponding to the next span to be constructed in the forward longitudinal direction of construction of the bridge, island crane means and support means disposed on said island platform, and independently traveling bridge crane means disposed for longitudinal travel on said auxiliary girders, whereby said free ends of the auxiliary
  • the crossbeams are provided with lateral brackets at their ends which have roller mountings thereon in operative contact with said auxiliary girders to accommodate the longitudinal displacement of said auxiliary girders with respect to said crossbeams while supporting said auxiliary girders thereon at a level corresponding substantially to that of the main bridge span girders yet laterally outwardly thereof.
  • the island support means is in the form of a pair of laterally spaced apart transversely displaceable island brackets having hydraulic jack means thereon for transversely alignable corresponding operative supporting contact with said free ends of the auxiliary girders.
  • a method for constructing multispan bridges across water in successive spans mainly from heavy prefabricated elements which comprises establishing at least two longitudinally spaced apart transverse crossbeams supported at the height at which the bridge is to be built as well as a pair of transversely spaced apart longitudinal auxiliary girders laterally outwardly resting thereon and spanning the longitudinal distance therebetween, such that said auxiliary girders are longitudinally displaceable with respect to said crossbeams and have a length greater than the longitudinal distance between said crossbeams to provide corresponding cantilever free ends of said auxiliary girders longitudinally extending substantially beyond said crossbeams, providing independently travelling bridge crane means disposed for longitudinal travel on said auxiliary girders, maintaining an island platform independently removably positioned in the water ahead of the corresponding free ends of said auxiliary girders at a distance corresponding to the next span to be constructed in the forward longitudinal direction of construction of the bridge with island crane means and island support means disposed thereon, drawing said free
  • Such an arrangement and method have the advantage that the construction of the bridge is entirely independent of water, terrain and weather conditions.
  • the entire material used for constructing the bridge can be brought along from the land side, via the bridge sections which have already been finished and thence the auxiliary girders. This has especially proved advantageous when constructing bridges which lead out into the open sea like landing piers, where the supply of materials by boat is impossible in choppy or heavy seas.
  • a lifting island a constructional apparatus itself well known, has the advantage that not only are the auxiliary girders adequately supported at any desired height at their free projecting ends, but also the entire device for constructing the uderstructures can be placed on the lifting island platform without difficulties, thus relieving the auxiliary girders and their undersupports of such heavy equipment.
  • the lifting island is able to carry very heavy lifting equipment so that the understructure can also be constructed out of large prefabricated concrete sections.
  • the platform When the platform is raised up on the lifting island, the latter will also be able to withstand heavy storms and can even be moved on effortlessly and rapidly to a safe location.
  • the lifting island is first brought into position in front of the end of the particular pier which is to be erected.
  • the auxiliary girders are then advanced into the 'bridge span which is limited, on the front-structure side, by the piers which are to be erected, and are grasped at their freely projecting fore-ends by lifting equipment arranged on the lifting island and then further advanced whilst supported in this manner and set down on the edge of the lifting island platform.
  • This method of :working has the advantage that the auxiliary girders do not have to extend over two bridge spans.
  • both the superstructures and the understructures of the bridge are preferably manufactured from prefabricated units, such as reinforced or prestressed concrete, which may also be of a relatively large size, and which thus ensure rapid progress of the building work.
  • a device for carrying out the successive span construction includes two auxiliary girders, carried movably and fixably appropriately on the bridge piers, along both sides of the superstructure which is to be erected, and at least one Portal crane travelling on such auxiliary girders, this crane taking prefabricated vbuilding sections and/or building materials brought along via the superstructures which have already been nished and passing them on to the point where they are to be incorporated into the next -successive span to be erected.
  • auxiliary girders alongside the superstructures which are to be erected has the advantage that the auxiliary girders can lie at the same height or level ⁇ as the main bridge span girders of the superstructure.
  • Their support is therefore particularly simple especially when the piers -are formed by several pillars Vwhich are connected to one another by means of a crossbeam at the top of the pillars.
  • auxiliary girders By arranging the auxiliary girders laterally to the superstructure both the movement of main girders, consisting of prefabricated sections made of reinforced or prestressed concrete, and the transportation of prefabricated sections, such aas piles and pillars for the understructure or piers is rendered particularly simple, and the transportation of the understructure parts does not interfere with the assembly and casting of the superstructure parts.
  • FIG. l 10 denotes a landing bridge built out to sea, for ships riding at the roads, this bridge being subdivided in a longitudinal direction into a number of bridge spans 11, 12, 13 and 14. However, only a part of the bridge is shown in FIG. l. The bridge is built out yfrom the land in the direction of arrow 15.
  • the spans 11, 12, 13 and 14 of the superstructure are bounded by bridge piers 16, 17, 18 and 19, the last just going into place, which in the present example of an ernbodiment are each formed by two single pillars 16a and 1Gb, 17a and 17b, 18a and 18b and 19a and 19b, as the case may be, spaced apart from one another in a transverse direction, and connected to one another at their tops ends by corresponding crossbeams 16C, 17C, 18C and 19C.
  • the main bridge -span girders 20 of the superstructure bridging the gaps at spans 11, 12, 13 and 14 rest on the '5 crossbeams 16e, 17C, 18a ⁇ and 19C. They, as well as the building supports or piers 16, 17, 18 and 19 and their crossbeams 16e, 17C, 18t ⁇ and 19e, consist prefera'bly of prefabricated parts made of prestressed concrete.
  • the main girders 20 are connected to one another by a track plate 40 (see FIG. 5) lying on top which need not be Irepresented in more detail here.
  • Steel lateral brackets 35 are mounted on both end faces of each crossbeam 16e, 17e, l8r. ⁇ vand 19C, and on these, i.e., at both sides of the superstructures or maln girders 20, a corresponding steel auxiliary girder 21 having a lbox beam section is carried on roller mountings 22 so as to be movable in a longitudinal direction and iixable, i.e., at their free or cantilever ends 23.
  • the auxiliary girders 21 in the present embodiment as shown span two bridge spans 13 and 14 and at their rear end project somewhat into span 12. At their front freely projecting or cantilever end 23 they rest, with interposition of hydraulic jacks 24, on island 'brackets 25.
  • Brackets 25 are mounted at the edge of the platform 26 of an independently removably positioned lifting island 27 so as to be sideways adjustable (see FIG. 3), the island being supported on the bed 39 of the water by means of its supporting legs 28.
  • Two portal cranes 29 and 30 run on the auxiliary girders 21 which act as tracks therefor.
  • the cranes take the prefabricated sections needed for constructing the ununderstructures and superstructures from the rolling trucks 31 and 32 which run on the main girders 20 of the bridge (see FIG. 2), and transport them in the longitudinal direction and also in the transverse direction of the bridge (see FIGS. 4 and 5).
  • the parts needed for the understructures are taken over *by a derrick crane 33, which is anchored to the platform 26 of the lifting island.
  • the derrick crane 33 On heaving in and incorporating the prefabricated sections required for the understructure the derrick crane 33 is assisted by two small jib cranes 34, of which only one is represented in the drawing, which can be swivelled about the supporting legs 28 of the lifting island which -face the bridge and which stand on the platform 26 of the lifting island.
  • the 'bridge is constructed in the following manner:
  • auxiliary girders 21 rest on the brackets 35 of the crossbeams 16e, 17C and 18C in such a way that the front ends 23 of the auxiliary girders 21 are supported by appropriate brackets 35 of the crossbeam 18e.
  • the lifting island 27 is brought into position in front of the bridge pier 19 which is to be constructed.
  • the auxiliary girders 21 are then advanced into the bridge span 14 with their freely projecting fore-ends 23 being supported by the load hooks of the derrick crane 33 as soon as they have approximately reached the middle of the superstructure span 14.
  • the auxiliary girders are then further advanced, with simultaneous lifting of the jib 37 of the dern'ck crane 33, and are placed with their freely projecting fore-ends 23 on the 'brackets 25 of the lifting island 26. Since these brackets can be moved sideways, they can be brought precisely llush with the auxiliary girders 21 if the lifting island is in a position which is somewhat sideways displaced relative to the longitudinal axis of the bridge.
  • the portal cranes 29 and 30 then travel on the auxiliary girders 21 into span 14.
  • the front end of the pile 38 is then taken by the jib cranes 34 and slowly lowered whilst the derrick crane 33 takes the rear end of the pile and lifts it so that the pile can be introduced into the bore hole in the seat bed 39 as soon as the pile hangs approximately vertically (right-hand half of FIG. 1).
  • the piles 38 can then be rammed even more deeply into the bed by means of a conventional rammer suspended from the derrick 33 but not shown in any detail here.
  • the upper parts of pier 19 of the building supports which also consist of prefabricated sections, are brought along from the land in the same manner, via the bridge 10, and are assembled. Thereafter the prefabricated crossbeam 19e is brought along, lifted 4by the derrick 33, turned, placed on the tops of the supports 19a and 19b and coupled with them (see FIG. 4).
  • the main girders 20 for the bridge span 13 can be separately brought along and put in place. This can also be done by means of the portal cranes 29 and 30, which not only permit longitudinal transportation but also transportation of the main girders 20 in a transverse direction and thus permits precise laying of the individual parts (see FIG. 5).
  • Arrangement for constructing multispan bridges across water in successive spans mainly from heavy prefabricated elements which comprises at least two longitudinally spaced apart transverse crossbeams supported at the height at which the bridge is to be built, a pair of transversely spaced apart longitudinal -auxiliary girders laterally outwardly resting on said crossbeams and spanning the longitudinal distance therebetween, said auxiliary girders being longitudinally displacea-ble with respect to said crossbeams and having a length greater than the longitudinal distance between said crossbeams to provide corresponding cantilever free ends of said auxiliary girders longitudinally extending substantially beyond said crossbeams, an island platform independently removably positioned in the water ahead of the corresponding free ends of said auxiliary girders at a distance corresponding to the next span to be constructed in the forward longitudinal direction of construction of the bridge, island crane means and island support means disposed on said island platform, and independently traveling bridge crane means disposed for longitudinal travel on said auxiliary girders, whereby said free ends of the
  • crossbeams are provided with lateral brackets at their ends which have roller mountings thereon in operative contact with said auxiliary girders to accommodate the longitudinal displacement of said auxiliary girders with respect to said crossbeams while supporting said auxiliary girders thereon at a level corresponding substantially to that of the main bridge span girders yet laterally outwardly thereof.
  • said island support means is in the form of a pair of later-ally spaced apart transversely displaceable island brackets having hydraulic jack means thereon for transversely alignable corresponding operative supporting contact with said free ends of the auxiliary girders.
  • said island crane means includes a main derrick crane and a pair of laterally disposed jib cranes and said independently traveling bridge crane means includes a pair of independently traveling portal cranes -arranged in tandem, each spanning transversely the distance between said auxiliary girders and operatively riding along said auxiliary girders which serve as tracks therefor.
  • auxiliary girders are in the form of box beam girders and said crossbeams are supported from below by corresponding bridge piers.
  • Method for constructing multi-span bridges across water in successive spans mainly from heavy prefabricated elements which comprises establishing at least two longitudinally spaced apart transverse crossbeams supported at the height at which the bridge is to be built as well as a pair of transversely spaced apart longitudinal auxiliary girders laterally outwardly resting thereon and spanning the longitudinal distance therebetween, such that said auxiliary girders are longitudinally displaceable with respect to said crossbeams and have a length greater than the longitudinal dist-ance between said crossbeams to provide corresponding cantilever free ends of said auxiliary girders longitudinally extending substantially beyond said crossbeams, providing independently travelling bridge crane means diposed for longitudinal travel on said -auxiliary girders, maintaining an island platform independently removably positioned in the water ahead of the corresponding free ends of said auxiliary girders at a distance corresponding to the next span to be constructed in the forward longitudinal direction of construction of the bridge with island crane means and island support means disposed thereon, drawing said free ends of

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
US627071A 1966-04-01 1967-03-30 Arrangement and method for constructing multispan bridges or the like Expired - Lifetime US3448511A (en)

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DEST25196A DE1258888B (de) 1966-04-01 1966-04-01 Verfahren zum Herstellen mehrfeldriger Bruecken od. dgl. und Einrichtung hierfuer

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DK (1) DK128290B (xx)
ES (1) ES338731A1 (xx)
FR (1) FR1515689A (xx)
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US3699688A (en) * 1970-11-25 1972-10-24 Bethlehem Steel Corp Apparatus and method for removing and/or adding column sections to a column of a marine structure
US3845515A (en) * 1971-08-14 1974-11-05 E Gelhard Self-progressing construction system
US3878662A (en) * 1973-07-09 1975-04-22 Louis C Cernosek Method of constructing a remotely located drilling structure
US4103503A (en) * 1976-12-21 1978-08-01 Dixilyn International, Inc. Drilling substructure transfer system
US4301565A (en) * 1980-03-19 1981-11-24 Irwin Weinbaum Method and system for the removal and replacement of a bridge
US4497153A (en) * 1981-06-19 1985-02-05 Mueller Eberhard Method and device for erecting building structures such as bridges, using pre-fabricated concrete beams
US4662784A (en) * 1984-12-07 1987-05-05 James Hipp Method of installing pipe strings through offshore drilling platforms already in place
US4687379A (en) * 1985-02-22 1987-08-18 Robishaw Alces P Method and apparatus for constructing elevated structures
US4799279A (en) * 1985-12-02 1989-01-24 Figg And Muller Engineers, Inc. Method of constructing the approach and main spans of a cable stayed segmental bridge
US4907915A (en) * 1989-04-25 1990-03-13 Glasstech, Inc. Template for installing photovoltaic panel assembly and method
US4938628A (en) * 1989-10-31 1990-07-03 Transworld Drilling Company System for moving drilling module to fixed platform
US5052860A (en) * 1989-10-31 1991-10-01 Transworld Drilling Company System for moving drilling module to fixed platform
WO1996005375A1 (en) * 1994-08-08 1996-02-22 Global Associates, Ltd. Construction of large structures by robotic crane placement of modular bridge sections
US6701564B2 (en) * 2002-05-24 2004-03-09 Snead Edwin Desteiguer System and method for positioning a pile cap underneath an existing elevated bridge assembly
US20050262651A1 (en) * 2002-05-24 2005-12-01 Snead Edwin D Method of moving a component underneath a bridge assembly with a cable
US20070163058A1 (en) * 2005-12-20 2007-07-19 Flatiron Constructors, Inc. Method and Apparatus for Bridge Construction
US20120036811A1 (en) * 2009-04-15 2012-02-16 Vsl International Ag Overhead form traveller and method
CN104037630A (zh) * 2014-06-13 2014-09-10 国网四川省电力公司双流县供电分公司 变电站门构架辅助放置安装系统
CN109555011A (zh) * 2019-01-17 2019-04-02 长安大学 一种全预制桥墩和承台的组合构造及制造和装配方法
CN116500885A (zh) * 2023-06-27 2023-07-28 兰州交通大学 一种基于物联网的高铁桥梁顶升智能控制调节方法及系统

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FR2520718B1 (fr) * 1982-02-03 1986-03-14 Montcocol Portique mobile permettant le levage et la mise en place de tabliers auxiliaires et/ou provisoires pour ponts, en particulier pour ponts de chemins de fer
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CN112227214B (zh) * 2020-10-27 2022-08-12 河南六建重工有限公司 一种钢构件的拼装结构及其安装方法
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CN113512932B (zh) * 2021-03-19 2022-11-25 宁波市政工程建设集团股份有限公司 预应力钢束连接的预制小箱梁式隐盖梁及其施工方法
CN114808752B (zh) * 2022-04-27 2023-09-05 中交路桥建设有限公司 钢桁梁双顶托举顶推安装方法

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US3055090A (en) * 1956-01-23 1962-09-25 Yuba Cons Ind Inc Apparatus for bridge construction
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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699688A (en) * 1970-11-25 1972-10-24 Bethlehem Steel Corp Apparatus and method for removing and/or adding column sections to a column of a marine structure
US3845515A (en) * 1971-08-14 1974-11-05 E Gelhard Self-progressing construction system
US3878662A (en) * 1973-07-09 1975-04-22 Louis C Cernosek Method of constructing a remotely located drilling structure
US4103503A (en) * 1976-12-21 1978-08-01 Dixilyn International, Inc. Drilling substructure transfer system
US4301565A (en) * 1980-03-19 1981-11-24 Irwin Weinbaum Method and system for the removal and replacement of a bridge
US4497153A (en) * 1981-06-19 1985-02-05 Mueller Eberhard Method and device for erecting building structures such as bridges, using pre-fabricated concrete beams
US4662784A (en) * 1984-12-07 1987-05-05 James Hipp Method of installing pipe strings through offshore drilling platforms already in place
US4687379A (en) * 1985-02-22 1987-08-18 Robishaw Alces P Method and apparatus for constructing elevated structures
US4799279A (en) * 1985-12-02 1989-01-24 Figg And Muller Engineers, Inc. Method of constructing the approach and main spans of a cable stayed segmental bridge
US4907915A (en) * 1989-04-25 1990-03-13 Glasstech, Inc. Template for installing photovoltaic panel assembly and method
WO1990012926A1 (en) * 1989-04-25 1990-11-01 Glasstech, Inc. Template for installing photovoltaic panel assembly and method
US4938628A (en) * 1989-10-31 1990-07-03 Transworld Drilling Company System for moving drilling module to fixed platform
US5052860A (en) * 1989-10-31 1991-10-01 Transworld Drilling Company System for moving drilling module to fixed platform
US5511268A (en) * 1994-08-08 1996-04-30 The United States Of America As Represented By The Secretary Of Commerce Construction of large structures by robotic crane placement of modular bridge sections
WO1996005375A1 (en) * 1994-08-08 1996-02-22 Global Associates, Ltd. Construction of large structures by robotic crane placement of modular bridge sections
US7363671B2 (en) 2002-05-24 2008-04-29 Snead Edwin Desteiguer Method of moving a component underneath a bridge assembly with a cable
US6701564B2 (en) * 2002-05-24 2004-03-09 Snead Edwin Desteiguer System and method for positioning a pile cap underneath an existing elevated bridge assembly
US20050262651A1 (en) * 2002-05-24 2005-12-01 Snead Edwin D Method of moving a component underneath a bridge assembly with a cable
US7013520B1 (en) 2002-05-24 2006-03-21 Snead Edwin Desteiguer Method for positioning a pile cap underneath an existing elevated bridge assembly
US20090282625A1 (en) * 2005-12-20 2009-11-19 Flatiron Construction, Inc. Method and Apparatus for Bridge Construction
WO2007076417A3 (en) * 2005-12-20 2008-11-27 Flatiron Constructors Inc Method and apparatus for bridge construction
US7520014B2 (en) * 2005-12-20 2009-04-21 Flatiron Constructors, Inc. Method and apparatus for bridge construction
US20070163058A1 (en) * 2005-12-20 2007-07-19 Flatiron Constructors, Inc. Method and Apparatus for Bridge Construction
US8060966B2 (en) 2005-12-20 2011-11-22 Flatiron Constructors, Inc. Method and apparatus for bridge construction
US20120036811A1 (en) * 2009-04-15 2012-02-16 Vsl International Ag Overhead form traveller and method
US8869336B2 (en) * 2009-04-15 2014-10-28 Vsl International Ag Overhead form traveller and method
CN104037630A (zh) * 2014-06-13 2014-09-10 国网四川省电力公司双流县供电分公司 变电站门构架辅助放置安装系统
CN104037630B (zh) * 2014-06-13 2016-02-03 国网四川省电力公司双流县供电分公司 变电站门构架辅助放置安装系统
CN109555011A (zh) * 2019-01-17 2019-04-02 长安大学 一种全预制桥墩和承台的组合构造及制造和装配方法
CN116500885A (zh) * 2023-06-27 2023-07-28 兰州交通大学 一种基于物联网的高铁桥梁顶升智能控制调节方法及系统
CN116500885B (zh) * 2023-06-27 2023-08-25 兰州交通大学 一种基于物联网的高铁桥梁顶升智能控制调节方法及系统

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GB1147723A (en) 1969-04-02
DK128290B (da) 1974-04-01
SE323095B (xx) 1970-04-27
DE1258888B (de) 1968-01-18
NO116672B (xx) 1969-05-05
FR1515689A (fr) 1968-03-01
ES338731A1 (es) 1968-04-01
BE696233A (xx) 1967-09-01

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